Foldable triangular warning sign



FIG. 1 is a perspective view of a foldable triangular warning sign showing a first embodiment of our new design;

FIG. 2 is a front view of the first embodiment;

FIG. 3 is a rear view of the first embodiment;

FIG. 4 is a left side view of the first embodiment;

FIG. 5 is a right side view of the first embodiment;

FIG. 6 is a top view of the first embodiment;

FIG. 7 is a bottom view of the first embodiment;

FIG. 8 is a perspective view of the first embodiment in the folded state;

FIG. 9 is a perspective view of a foldable triangular warning sign showing a second embodiment of our new design;

FIG. 10 is a front view of the first embodiment;

FIG. 11 is a rear view of the second embodiment;

FIG. 12 is a left side view of the second embodiment;

FIG. 13 is a right side view of the second embodiment;

FIG. 14 is a top view of the second embodiment;

FIG. 15 is a bottom view of the second embodiment; and,

FIG. 16 is a perspective view of the second embodiment in the folded state.

The dashed broken lines illustrate portions of the foldable triangular warning sign and form no part of the claimed design. 

CLAIM The ornamental design for a foldable triangular warning sign, as shown and described. 